Bookmark



M. J. CONTER.

BOOKMARK.

APPLICATION FILED MAR. 13. 1922-,

Patented Dec. 12, 1922.

p fiw/anfo I Mam/00ml Patented ti es. 123 11922.

at ime MICHAEL J. oonrna, or PARK amen, trainers.

nooirnann.

Application filed March 13, 1922. Serial No. 543,162.

To all 2072 0172 it may concern Be it known that l, Mrornxnn J. C'on'rnn, a citizen of the United States, residing in Park Ridge, in the county of Cook and State of Illinois, have invented certain new, and useful Improvements in Bookmarks, of which the following is a specification, reference being bad to the accompanying drawings, forming a part thereof. I

The purpose of this invention is to provide an improved construction of an automatic book-mark, that is, a device adapted to be engaged with some portion of the book and extend between the leaves for keeping the placeof the reader'as adapted to pass from leaf to leaf automatically, as the'leaves are turned by the reader. it consists in the elements andieatures ofconstruction shown and described, as indicated in the claims.

In the drawings I Figure l is a perspective view of an open book equipped with a book mark embodying this invention.

Figure 2 is anaxial section of the body of the device embodying this invention upon an exaggerated scale. I

Figure 3 is a section at the line 3-3 on Figure 2.

Figure 4 is'a dissected view showing the main member of the device and associated parts in side elevation.

Figure 5 is a view-similar to Figure 2, showing a modification.

Figure 6 is a sectional View at the same plane as Figure 2, showing a preferred way of placing the device in the book for use.

In the drawings, the body or assembled leaves of the book with which the device is shown in use is indicated at A, the side covers, B, B, and the back of the cover, or connection between the side covers, at B and the body of leaves as bound together and lying open at C. The device embodying the invention comprises, as shown in the drawings, a tubular housing, D, in which there is mounted and journaled a spindle having at one end a head rabbeted or reduced in diameter to form a journal at D by which the spindle is rotatably mounted in the housing, and a flange head, D by which the spindle is stopped endwise in one direction on the end of the housing. At the other end the housing has a closure, F, which may be screwed into the housing, D, as shown, to a stop flange, F, with which it is provided so that it may be screwed tight. The closure has a central aperture tor journalinp the spindle, E, and the spindle extending through that aperture is reduced and threaded to a shoulder, e, tightly. against which a securing nut, G, may beset, said nut lap ping on the margin-oi the journal aperture of the closure for stopping the-spindle end.- wise in the opposite direction from that in which it is stopped by the-head flangefD at the opposite end of the housing. H is a spring coiled aroundthe'spindle. E, having one end engaged withv the spindle" and the other end with the housing, the engagement with the housing being by tl'ieinner end of the spring bentparaxially as seen. at h, and entering the paraxial aperture in the closure, F. At theother end the spring is engaged with the spindleby engagement with. the head. In the forni shown in Fig ure 2, the coiled spring is made of one piece of wire with the spring linger, J,hercinafter more particularly described. and the engagement of the coiled spring with the end piece is effected by a paraxialportion, 7L of the spring, which is formed between the forward portion and the radially extending portion which constitutes the spring finger, J. In this form the 'paraxial groove, d, in the journaling portion of the-head, D atfords lodgrnent for said paranial portion,

if, of the spring, and thespi'ing finger, J,

extends .out radiallythrough a sectoral radially' extending notch, (Z whose sectoral extent limits the swing of said spring fingerf This s rin fin er. Jxentends olt'substan- 1 tially at right angl s with tne .iXlSl olzthe housing, but normally trending somewhat I inwardly, that is, at'an acute angle to the axis, so as to insure the lapping of the inbent end, J on the face of the book. end, J is bent at an acute angle to the finger, inward toward the back, 13 C, of the book, so that as the leaf on which it rests is lifted for turning it as the reader advances, the leaf easily clears the finger'without crowding the latter off from its lodg- Inent, so that it remains lodged on the next leaf after the preceding leaf has been turned.

In. Figure 5 there is shown a modification consisting in making the spring finger, J, not integral with the coiled spring, H, but instead, terminating the coiled spring at the outer end in the same manner in which it is terminated at the other end, that is in a paraxially extending short portion, 02 for Said engagement of which the head, E, is suitably bored paraxially, and securing'the end of the finger, J, in said head in a radial bore,

seen in said figure. i do not limit myself to the particular or detail construction shown and described,

since it is obvious that various methods or":

able, and certain of them are specifically claimed. I

Kis a spring clasp finger which is secured to the upper end of the housing, D, and extends along-the outside of the housing tor clasping the device in place on the book with the housing inserted between the back, B and the body, C, of the book and the clasping finger engaged preferably between the leaves of the body of the book, as seen in Figures 1 and 6. The claspfinger, however, may be engaged with the back, B, seen in Figure 2, without materially changing the mode of operation oi the device.

I clainrz I 1. An automatic book-mark comprising a tubular housing adapted to be inserted between the back of the cover of the book and the body of leaves thereof, and means by which it is grasped to the book; a spindle journaled and longitudinally stopped in said housing; a sp ing coiled about the spindle in the. housing and reacting between the spindle and the housing for rotating or rocking the spindle in one direction; means for limiting such rocking movement, and a spring finger extending radially from the head of the spindle at one end ofthe housing having its extremity bent inward for lapping the leaves of the book.

2. in the construction defined inclaiin l, foregoing, the spindle having its head at the end "from which. the spring finger extends reduced. to form a journal for the spindle in the housing, anda stop shouldenfor endwise stopping, the other end of the housing having a closure apertured to form a gown.

nal bearing for the spindle, said spindle being extended therethrough and reduced and threaded, and a nut screwed onto the reduced end to the shoulder and stopping the spindie endwise against the closure in the opposite direction from that in which the head of the spindle stops it at the other end.

. linthe construction defined 1n clann l,

foregoing, the housing having a closure at the wire bent to form a portion extending paraxially of the spring between the coiland the finger, the end of the housing from'which the spring linger extends having a segmentall 1 extending notch for limiting the swin l o t:

of the spring finger; and the journaled portion oi: they head of the spindle having a Sparaxially ext para ially extending portion of the spring, whereby the spring is rotatively engaged with the spindle at that end. In testimony whereof, I have hereunto set my hand at Chicago, Illinois, this 9th day of March, 1922.

. mum J. ooNrER,

ending notch for lodgm'ent on the extending figure being an integral piece of 

